Cichlidogyrus berminensis, Pariselle, Antoine, Bitja Nyom, Arnold R. & Bilong Bilong, Charles F., 2013

Pariselle, Antoine, Bitja Nyom, Arnold R. & Bilong Bilong, Charles F., 2013, Checklist of the ancyrocephalids (Monogenea) parasitizing Tilapia species in Cameroon, with the description of three new species, Zootaxa 3599 (1) : -

Cichlidogyrus berminensis n. sp.

( Fig. 3 )

Type host: Tilapia bemini Thys van den Audenaerde.

Other hosts: Tilapia gutturosa Stiassny, Schliewen & Dominey , Tilapia bakossiorum Stiassny, Schliewen & Dominey , Tilapia thysi Stiassny, Schliewen & Dominey.

Site: Gills.

Type locality: Lake Bermin, Cameroon (5°09’22” N; 9°37’54” E).

Specimens deposited: Holotype and 4 paratypes MNHN n° HEL 274. Paratypes MNHN (5) n° HEL 275; NHMUK (5) n° 2012.8.30.2; RMCA (5) n° 37703.

Etymology: Named after the type locality.

Description (based on 25 individuals): adults 447 (330–724) (25) long. 65 (32–91) (25) wide at level of penis. Pharynx globular 26 (19–37) (25) in diameter. Dorsal anchor with guard four times longer than shaft and regularly curved blade: a = 35 ± 1.8 (30–38) (49), b = 27 ± 1.3 (23–29) (49), c = 3 ± 0.6 (1–4) (49), d = 12 ± 1.1 (9–14) (49), e = 9 ± 0.7 (7–11) (47). Short arched dorsal transverse bar, thick at the middle, tapering toward the extremities: x = 23 (20–25) (25), w = 5 (4–7) (25), y = 8 (6–13) (25), h = 14 ± 1.3 (11–17) (50). Ventral anchor with guard three times longer than shaft, blade regularly arched: a = 36 ± 1.8 (32–38) (46), b = 33 ± 2.1 (29–38) (47), c = 3 ± 0.7 (2–5) (48), d = 9 ± 0.9 (6–10) (47), e = 12 ± 0.8 (11–14) (48). V–shaped and thick ventral transverse bar, branches straight: x = 31 ± 2 (28–35) (50), w = 5 (4–7) (25). First uncinuli of medium size, third to seventh short: U I = 18 ± 0.9 (16–20) (49), U II = 11 ± 0.5 (11–13) (38), U III = 17 ± 0.8 (14–18) (50), U IV = 19 ± 0.8 (17–21) (48), U V = 19 ± 0.8 (18–21) (50), U VI = 19 ± 0.8 (17–20) (45), U VII = 16 ± 0.8 (14–18) (46). Male copulatory complex (MCC) with a short and slightly sinuous penis (Pe) starting as a bulb, a marked narrow heel (He) with rounded ending and a simple and straight accessory piece (AP) ending in a large hook: Pe = 27 (24–30) (25), He = 5 (4–6) (25), AP = 28 (25–30) (25). No sclerotised vagina.

Remarks: By the morphology of the U 1 (of medium size), C. berminensis n. sp. resembles Cichlidogyrus albareti Pariselle & Euzet, 1998 ; Cichlidogyrus arfi Pariselle & Euzet, 1995 ; C. arthracanthus ; Cichlidogyrus inconsultans ( Birgi & Lambert, 1986) ; Cichlidogyrus kothiasi Pariselle & Euzet, 1994 ; Cichlidogyrus muzumani Muterezi Bukinga, Vanhove , van Steenberge & Pariselle, 2012; Cichlidogyrus nandidae Birgi & Lambert, 1986 ; Cichlidogyrus nshomboi Muterezi Bukinga, Vanhove , van Steenberge & Pariselle, 2012 and Cichlidogyrus reversati Pariselle & Euzet, 2003 . C. albareti , C. arfi , C. arthracanthus , C. inconsultans , C. muzumani and C. nandidae all have a much longer penis (> 100,> 60,> 100,> 190,> 60,> 120 respectively vs. 27). C. nshomboi had a spirally coiled thickening at the extremity of the penis (vs. absence); C. kothiasi had a spirally coiled penis (vs. straight); and C. reversati has its penis extremity folded back (vs. straight). The MCC of C. berminensis n. sp. resembles that of Cichlidogyrus berradae Pariselle & Euzet, 2003 and that of Cichlidogyrus yanni Pariselle & Euzet, 1995 , but these two species show a very large uncinuli pair 1 (26 and 24 vs. 18).

Figures

FIGURE 3. Hard parts of Cichlidogyrus berminensis n. sp. Ap, accessory piece; He, heel; Pe, penis. DA, dorsal anchor. DB, dorsal transverse bar. VA, ventral anchor. VB, ventral transverse bar. I – VII, uncinuli (scale bar = 30 µm).